#properties {
    margin: 0 1em;
    h3 {
        margin: 2em 0.5em;
    }
    div {
        span {
            display: inline-block;
            margin: 0 6px;
        }
        input[type="submit"] {
            margin: 0;
            font-family: "Microsoft Yahei";
        }
    }
}
